Logic Masters Deutschland e.V.

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Rules:

Regular sudoku rules:

Place the digits 1-9 in every row, column, and box

Killer cages:

Digits in a cage can not repeat and must sum to the number in the upper left corner of the cage

Modular line:

Any set of three sequential cells along a teal modular line contains one digit from (1,4,7), one digit from (2,5,8), and one digit from (3,6,9)

Anti-knight constraint:

Cells that are a knight's move (in chess) apart must not contain the same digit.

Black Kropki Dots:

Black dots separate pairs of digits that have a ratio of 2:1. Not all dots are given